Privacy & email
What we store
If you join the email list, we store your email address, subscription status, confirmation token, and signup time. For confirmed subscribers we also record which daily emails have been sent, to avoid duplicates.
Your puzzle answers
Your answers, scratchpad, hints, guesses, active time, and completion status are saved in this browser so you can return to a puzzle. Your answers and scratchpad are not submitted to our server or linked to your email address. Clearing this site’s browser data removes that progress. If browser storage is unavailable, progress lasts only for the current visit. We do not use advertising tracking pixels.
Puzzle activity
We measure visits, answer attempts, successful checks, hint and solution reveals, sharing, and signup submissions. A random browser identifier lets us count repeat visits; it is separate from your email address. We store the event type, puzzle number, edition day, time, and a campaign label from a fixed list. We do not store your answer, scratchpad, full referring URL, or IP address in this activity table. These counts describe browser activity, not verified people or exam results.
Measurement is optional and respects Global Privacy Control. Turning it off stops future activity collection on this browser and removes its local measurement identifier.
Google Analytics
When configured, Google Analytics loads only after you choose “Allow analytics.” It uses cookies to measure page visits and puzzle actions. Google receives technical data, including your IP address during transmission. We disable advertising features and automatic form tracking, and send page paths without query strings or subscription tokens. Answers, scratchpads, email addresses, and our private browser identifier are never sent to Google. You can change this choice below; Global Privacy Control and the activity measurement opt-out also block Google Analytics.
Completion summaries
When optional measurement is enabled, we record one completion summary per browser and puzzle: solved, solved with hints, or solution viewed; guesses; hints used; and active time. Summaries use the same random measurement identifier and a campaign label, without your answer, scratchpad, or email address. Reloading a completed puzzle may resend its summary; duplicates are ignored. These browser-reported results will help us understand puzzle difficulty and may support community breakdowns once enough results exist. They are not verified people or competitive scores. Using “Try again” starts a local practice round; practice guesses, hints, solution reveals, and completion summaries are not submitted. Your first result stays unchanged.
Feedback
If you send a report, we store your message, the puzzle you selected, and an optional email address for a reply. Reports are private. Your saved answers and scratchpad are not attached automatically.
Email delivery
Joining sends a confirmation invitation. We send daily puzzles only after you explicitly confirm. Delivery uses Resend, which receives your email address and message content.
Unsubscribing
Every daily email includes an unsubscribe link. We retain an unsubscribed status to prevent accidental resubscription.